OpenAI News
Medical research with GPT-5
Learn how GPT-5 is used for medical research.
Topics: Models
Entities: Models
OpenAI News
GPT-5 System Card
This GPT-5 system card explains how a unified model routing system powers fast and smart responses using gpt-5-main, gpt-5-thinking, and lightweight versions like gpt-5-thinking-nano, optimized for different tasks and developer use.
Topics: Models
Entities: Models
OpenAI News
Introducing GPT-5
We are introducing GPT‑5, our best AI system yet. GPT‑5 is a significant leap in intelligence over all our previous models, featuring state-of-the-art performance across coding, math, writing, health, visual perception, and more.
Topics: Models
Entities: Models
OpenAI News
First look at GPT-5
See how a group of leading developers use GPT-5 for the first time.
Topics: Models
Entities: Models
OpenAI News
From hard refusals to safe-completions: toward output-centric safety training
Discover how OpenAI's new safe-completions approach in GPT-5 improves both safety and helpfulness in AI responses—moving beyond hard refusals to nuanced, output-centric safety training for handling dual-use prompts.
Topics: ModelsInfrastructure
Entities: OpenAIModelsInfrastructure
OpenAI News
Providing ChatGPT to the entire U.S. federal workforce
Today, OpenAI for Government is announcing a new partnership with the U.S. General Services Administration (GSA) to launch a transformative initiative. For the next year, ChatGPT Enterprise will be available to the entire federal executive branch workforce...
Topics: Models
Entities: ChatGPTOpenAIModelsChatGPT Enterprise
OpenAI News
Introducing gpt-oss
We’re releasing gpt-oss-120b and gpt-oss-20b—two state-of-the-art open-weight language models that deliver strong real-world performance at low cost. Available under the flexible Apache 2.0 license, these models outperform similarly sized open models on...
Topics: Models
Entities: Models
OpenAI News
Estimating worst case frontier risks of open weight LLMs
In this paper, we study the worst-case frontier risks of releasing gpt-oss. We introduce malicious fine-tuning (MFT), where we attempt to elicit maximum capabilities by fine-tuning gpt-oss to be as capable as possible in two domains: biology and cybersecurity.
Topics: Models
Entities: Models
OpenAI News
Open weights and AI for all
AI’s next frontier isn’t just about capability—it’s about who gets to use it. Our mission to put AI in the hands of as many people as possible is what drives us. Today’s release of our most capable open-weights models is a major step forward that makes...
Topics: Models
Entities: Models
OpenAI News
gpt-oss-120b & gpt-oss-20b Model Card
We introduce gpt-oss-120b and gpt-oss-20b, two open-weight reasoning models available under the Apache 2.0 license and our gpt-oss usage policy.